diff --git a/main.py b/main.py
index c1d679f..d0f0fd2 100644
--- a/main.py
+++ b/main.py
@@ -1,15 +1,26 @@
 import socket
 import urllib
 
+from functools import partial
 from unittest import TestCase
 
-from fixtures import device_mac, device_name, sensors
+import models
+import fixtures
 
 
 TCP_ADDR = ('127.0.0.1', 8283)
 UDP_ADDR = ('127.0.0.1', 8283)
 HTTP_URL = 'http://127.0.0.1:8080'
 
+nm_req = partial(
+    models.create_nm_req,
+    fixtures.device_mac,
+    fixtures.device_name,
+    fixtures.sensors,
+)
+
+json_req = None  # TODO
+
 
 class TestTCP(TestCase):
 
@@ -18,7 +29,7 @@ class TestTCP(TestCase):
         self.sock.connect(TCP_ADDR)
 
     def test_nm(self) -> None:
-        self.sock.sendall(b'')  # TODO
+        self.sock.sendall(nm_req().encode('utf-8'))
         self._wait_for_ok()
 
     def test_json(self) -> None:
diff --git a/models.py b/models.py
index 04d769a..6639004 100644
--- a/models.py
+++ b/models.py
@@ -1,5 +1,5 @@
 from dataclasses import dataclass
-from typing import Any
+from typing import Any, Iterable
 
 
 @dataclass
@@ -8,3 +8,25 @@ class SensorData:
     value: Any
     time: int | None = None
     name: str | None = None
+
+
+def create_nm_req(
+        dev_mac: str,
+        dev_name: str | None = None,
+        sensors: Iterable[SensorData] = ()) -> str:
+    '''Generate a NarodMon format (#mac#value) request'''
+
+    res = '#' + dev_mac
+    if dev_name is not None:
+        res += '#' + dev_name
+    res += '\n'
+
+    for s in sensors:
+        res += f'#{s.mac}#{s.value}'
+        if s.time is not None:
+            res += f'#{s.time}'
+        if s.name is not None:
+            res += '#' + s.name
+        res += '\n'
+
+    return res